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Derivative Instruments and Hedging Activities - Effective Portion of Gains (Losses) on Interest Rate Swap Agreements (Detail) - Interest expense - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Derivative [Line Items]      
Effective Portion Recognized in AOCI $ (8,481)    
Unrealized loss on qualifying cash flow hedging instruments   $ (7,458) $ 2,128
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net   $ 376 (152)
Ineffective Portion     $ 740
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax $ 2,320